US1481618A - Film-developing apparatus - Google Patents

Description

Jan. 22 1924.

H. c; F. MORANT FILM DEVELOPING APFARATUS Filed Oct. 22. 1920 Patented Jan. 22, 1924.

UNITED STATES PATENT OFFICE. I

FILM-DEVELOPING APPARATUS.

Application filed October 22, 1920. Serial No. 418366.

To (LN whom it maiy concern:

Be it known that I, HENRY CHARLES .FRANK MonxNT, a subject of the King of Great Britain, of: Monbulk, Riversdale load Hawthorn, in the State of Victoria, Australia, have invented certain new and useful Improvements in Film-Developing .Apparatus, of which the following is a specification.

In app-aratus at present used in developing a length of photographic film during daylight no provision is made for observance of the development of the film or the development of individual negatives nor for controllng the time limit of immersion of each which is necessary in order to secure the best development ofeach negative where the exposure has been more or less faulty.

The present invention contemplates provision for the observance and immersion manipulation stated and this is attained by a box shaped receptacle or tank containing the developing solution provided with a glass celluloid or like cover of transparent material of a color that will prevent actinic light rays Operating to afiect the sensitive film.

In order to facilitate observance of the film during development the sides of the tanl: are tted with one or more panels of ruby colored glass or celluloid and a lamp is arranged to project light rays On to the ihn surface.

Mani imlating means are provided within said .box receptacle for detachably securing the usual film spool and also external manu ally 'etuated means for rotating same to cause unwrapping of the film from one spool and its travel along the interior space to a receiving or transfer spool. Also within the receptacle are means for depressing sections of the film into the developing solution during its travel from end to end of the box receptacle, and at the same time preventing the negative surfaces while immersed Contacting with other surfaces in the container.

One practical form of the invention is depicted in the accompanying drawings whereof- Fig. 1 is a plan of the apparatus with the cover removed of a form of the invention for the independent development of negatives.

Fig. 2 a longitudinal vertical section through the apparatus.

Fig. 3 a vertical transverse section on line III-III, Fig. 2, and

Fig. 4 a fragmentary section on line IV- IV of Fig. 1.

As illustrated the apparatus comprises a rectangular vessel 1 which may be subdivided by one or more partitions such as 2 to form separate receptacles 3-4 to contain respectively developing solution and water.

At opposite ends of the tank near the top means are provided for Conveniently attaching for rotation the film spool 5 and the transfer spool 6. As illustrated a` short stud 7 is fixed on the wall and is adapted to engage the usual axial recess 8 in one end of the spool whilst the other end of the spool is attached to the end of a crank shaft 9 which enters the axial recess 10 of the spool and is provided with a transverse pin 11 the projecting ends of which engage end recesses 12 formed in the end of the spool. The shaft 9 extends through the wall of the tank and a bearing sleeve 13 thereon and is provided with means to rotate the sh'aft such as a crank handle 14. A spring 15 is wrapped on the portion of the shaft between the tank wall and a Washer 16 at the inner end of said shaft which maintains the connection of the spool with the shaft.

In order to release the spool the latter is' moved endwise against the pressure of the spring to free first the stud 7 and then the inner end of the crank shaft and by reverse action the spool is rotatably fitted in the tank.

The end of the wrapper attached to the film spool 5 is passed along the tank and its end is attached to the transfer spool 6 means being provided for insuring the film F as it is drawn from spool 5 to spool 6 being immersed in the liquid in the receptacles.

As illustrated the means consist of an immerser comprising a pair of arms 17 fixed to a shaft 18 rotatably mounted in the side walls of the tank one end of the shaft projecting through the wall and bent to form a crank handle 19.

Said arms bear upon the side edges of the film and the arms of each immerser may be connected by a curved bridge piece 20.

Said arms and bridge piece may be formed ot' a suitably bent single length of vvire the ends of which are fixed to the shaft 18 as illustrated Whilst the don nivardly project ing loops 30 act guides for the film. It Will be understood that by tnrning the Cl'tl'lll arms a portion of the film, i. e. a single negative may be pressed down till fnlly immersed in the developing solution or the Water.

A fianged metal cover 21 fits over the tank said cover having a ruby tinted glass panel 22 and provided With a' hinged lid 23.

One side of the tank may he provided With ruhy tinted gass pancls to admit light on the negative in each re xcptacle so that hy looking down through the transparent panel 22 of the cover, the pro 'ress of development of each negative in snccession may he observed In lien of the transl' arent side panels an electric ruby tinted lamp 25' in v he pio vided on theinte'ior side ot' the ,k wall as shown in' Fignycs 1. and 2 said hinip heing in circnit With a l ratteiy oi,- other source ot electric current. i

In order to faciltate the Washing ot the negatives by the solution the bottom ot' the tank may bc provided With rochers 26 on the nnderside.

In practice When developing n egzativcs individnally inthe appai'atus il nstratcd, the developing solution and the Water are supplied to the tanlst, the fihn spo-ol is iittcil to its crank shet& and the end oi" the' wrapper'attached to the film is pas i thronth the tanlz over the pai'tition 2 and attachcd to the transfer spool 6, after which the cove:: is placed on the tank and the spool 6 isrotated to draw the sensitized film into the receptacle 3 coi'itaining the developing sehr tion When the inn nerser arms are turned down to dep'ess a 'iegative into the solution. The tanh is then rocked till hy ()'l)S(-`l z`tl( through the transparent panel of the cover it is 'scertained that the negative is setticiently developed When the sponl (3 i'm tated to bring the 'next negative into the solution and the previous one into the v ashing Water contained in the next receptaele t.

By this means' each negative may he develoI ed independent ot the others of a film the completely developed film being tvomd on the spool 6 which is then removed from the tank to enable the negatives to be immcrsed in a fixing bath.

I clainu- 1. Improved film developing appa'atus comptising a container tor developing solution and having means for manipulating the film 'said container having means to permit observation of the film and means to prevent passage of actinic light rays and a lamp arranged to project nonactinic light rays on the film.

2. Improved film developing apparatus comprising` a container toi" developing S0l11- tion and having means to pcrnit ohservation of the film and means to prevent passage of actinic light rays,- a film spool and transfer spool each detachahly inonnted in the container.

3. mpt'oved filni developing apparatns conprising a container toi' devclopng solntio'n and having means toi" niani nilating the film, said co-inainei` hei arranged to pei'init ob'servation 'of the ihn and. prevent passage of actinic light ray& and means to innie'se each negative in the dcveloping so'- ln'tion and including Operating ineans arranged exteriorly of the contai e e. improved film developing pparatns comprising a conte-iher toi' developing solution' 'and having means for mani. pnlating the film, said container being ari-an l to permit ohservation of the film and prevent saqe of actinic light rave and film iinnierseis each consisting of arms', a shutt to which' said arms are fixed, said shatt yeing monnted in hearings in Walls of the contaner and artanged With one end projecting through one Wall, and a crank handle on said projecting end.

5. improved film developing apparatns coinp'isng a container for developing SOlIltion and having means for nanipnlating the ti in, said container having means to perinit observation of the film and means to' prevent passage of actinic light rave, and, lihi-1 irnnn'sers each consisting of a shatt inounted for pivotzl movement in walls oi" the container and arms fixed to said shatt, said arms having projecting hooks a't their ends.

Dated this 13th day of August,` 1920.

HENRY CHARLES FRANK MORANT.

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